|Publication number||US4227246 A|
|Application number||US 05/957,866|
|Publication date||Oct 7, 1980|
|Filing date||Nov 6, 1978|
|Priority date||Nov 6, 1978|
|Publication number||05957866, 957866, US 4227246 A, US 4227246A, US-A-4227246, US4227246 A, US4227246A|
|Inventors||Warren T. Vaughan, III, Gordon MacDonnell|
|Original Assignee||Vaughan Iii Warren T, Macdonnell Gordon|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (6), Referenced by (6), Classifications (5)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This is a continuation, of Ser. No. 796,738, filed May 13, 1978, now abandoned.
The invention described herein relates in general to the measurement and the analysis of physical and chemical properties of water and other fluids. More particularly, the subject invention is a system for the synchronous collection of selected fluid-related data and for management of these data, including storage and display of information.
Information as to the constituency and character of fluids, particularly water, is necessary in many applications such as for oceanographic and limnological research, for pollution control and monitoring, for industrial process and quality control, for acquaculture and fishery programs, and as an educational tool for predicted learning projects in schools. Present measurement and analytical devices are either too cumbersome, complex and expensive, or they are unsophisticated and limited in scope, lacking necessary accuracy and reliability. Heretofore, fluid measurement devices have not provided a simple, inexpensive, accurate, and self-contained means of acquiring and storing data of and within a fluid environment.
The present invention has overcome the disadvantages of prior fluid measurement and analytical methods and provides a highly versatile, accurate, self-calibrating and programmable system which may be used independent of external power and control requirements. The non-complex operation of the instant invention enables the collection of data by operators unskilled in the science of chemical and physical analysis. The subject invention stores accumulated information within an immersed Probe Control Unit during soundings. Data need not, therefore, be immediately transmitted to a surface of external reading device, but may be accussed later by use of a compatible Interpreter Unit, or data cassettes may be withdrawn and shipped to an information processing center away from the field.
Accordingly, it is an object of the subject invention to provide a simple, low-cost, multi-function, programmable, microcomputer-controlled fluids analysis system.
It is a further object of the subject invention to provide a self-contained, automated system to better meet the needs of all individuals and entities involved in the measurement and analysis of fluids.
FIG. 1 is a schematic block diagram of the surface Interpreter Unit.
FIG. 2 is a schematic block diagram of the underwater (or fluid-immersed) Probe Control Unit.
The surface Interpreter Unit provides for programming of the underwater Probe Control Unit prior to immersion. The Interpreter Unit controls the specific measurements desired for each sounding. The system can be programmed for triggering at specific depths, times, temperatures, etc., or any combination of chosen parameters. The Interpreter Unit includes:
1. A housing
2. A keyboard
3. A program memory
4. A data memory
5. Interface circuitry
6. A power supply, rechargeable batteries, and a battery charger
7. A visual readout
8. A data buss
9. A control buss
10. An address buss
11. A buffer and latches
12. A keyboard memory
13. CMOS parallel interface elements
14. CMOS parallel/serial converters
15. A data recorder unit
The underwater Probe Control Unit is self-contained, independent of umbilical power and/or data links of the surface or a mother-ship, and independent of sonic, radio or other telemetering means. The Probe Control Unit includes:
1. A housing
2. Probes chosen for selected parameters
3. CMOS analog/digital converters and interfaces
4. A CMOS microprocessor central processing unit
5. A CMOS static program memory, counters, and buffers
6. A real-time clock, generator, and counter
7. A CMOS data storage memory
8. CMOS control logic for address decoding and interupt priority
9. A power supply and rechargeable batteries
10. A data buss
11. A control buss
12. A data recorder unit
13. CMOS parallel interface elements
14. CMOS parallel/serial converters
15. CMOS drivers
The resultant microcomputer uses thousands of programmed instructions and stored table entries to perform hundreds of essentially bit-parallel, word-serial, sequential operations of digital data in pre-programmed order. These logical operations accomplish functions which include control of measurement processes, interfacing, linearization of probe data, determination of calibration constants, data management, shifting converting, inverting, merging, computation, incrementing, deincrementing, self-checking of reference memory, etc.
This system can modify functions, times, triggering options, parameters, and sequences of parameters to be measured and recorded, depending upon the results of other parameters measured, all according to predetermined values and standards. Pre-programmed by professionals, the system may then be operated by laymen, as no operator monitoring or intervention is required. This feature eliminates unwanted variables due to operator or environmental conditions and greatly reduces field operation expense, while at the same time improving reliability, flexibility, productivity, and ultimate accuracy.
Gathered data are recorded on a digital tape cassette within the Probe Control Unit and may be recalled for immediate readout at the Interpreter Unit following soundings. Data may then be transmitted by radio or wire, entered directly into a ship-board or other computer, or forwarded to a remote agency equipped to collate the data as part of a specific project. This highly versatile and adaptable fluids measurement and analysis system monitors a selected number of the following parameters during soundings:
2. Depth by Pressure and Salinity
4. Conductivity and Salinity
5. Dissolved Oxygen
7. Current Velocity
8. Current Direction
10. Oil and Grease
11. Suspended Solids
12. Chemicals Oxygen Demand
13. Coliform Bacteria
19. Plant Nutrients
20. Synthetic Organics
21. Sunlight Attenuation
22. Ion Metering
23. Fluorescent Chlorophyll
24. Residual Chlorine
Many of the parameters to be measured involve technologies wherein analog probes experience significant degradation and drift, thus making frequent recalibration essential. Analog probes made for use in the existing systems are available for many of the above parameters, and are adaptable for use with the digital system of the subject invention. This system provides microcomputer-controlled analog/digital conversion and interfacing, performs the functions of log amplifiers and multiplying networks to linearize probe output, and determines constants for recalibration. Freedom from drift, greater versatility, and higher accuracy are employed logically to replace nonlinear circuits and much of the hardware required by prior art in the use of analog probes.
Many of the complex functions in sensing, control, data processing, recording and display that in prior art have been performed with complex and expensive hardware are accomplished largely by the operating software and programming of the subject invention. Prior art has primarily involved hardware and circuitry rather than input interface and control, computation, and programming techniques. With the subject system, innovative programmers will redesign the system to perform additional measurements and analyses by modifying the software, and by assigning even more complexity to the software.
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|Citing Patent||Filing date||Publication date||Applicant||Title|
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|Cooperative Classification||G01F15/06, G01N33/1886|